509782 has 16 divisors (see below), whose sum is σ = 941472. Its totient is φ = 201600.

The previous prime is 509767. The next prime is 509783. The reversal of 509782 is 287905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509783) by changing a digit.

509782 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1219 + ... + 1582.

It is an arithmetic number, because the mean of its divisors is an integer number (58842).

2⁵⁰⁹⁷⁸² is an apocalyptic number.

509782 is a deficient number, since it is larger than the sum of its proper divisors (431690).

509782 is a wasteful number, since it uses less digits than its factorization.

509782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 509782 is about 713.9901960111. The cubic root of 509782 is about 79.8843119507.

The spelling of 509782 in words is "five hundred nine thousand, seven hundred eighty-two".